Programmable coherent source arrays generated by spatial light modulators
- 10 July 1992
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 31 (20) , 3991-3998
- https://doi.org/10.1364/ao.31.003991
Abstract
Programmable coherent source arrays are generated by using addressable liquid-crystal spatial light modulators and two-dimensional arrays of Fresnel lenses. The modulators used are an optically addressed liquid-crystal light valve, a matrix-addressed pixelated display, and two devices that have individually addressable elements with specially designed patterned electrodes. One such device has a transparent electrode patterned as a Fresnel zone plate array; the other is a gate array used in a hybrid implementation with a Fresnel lens array etched on a glass substrate. The operation of devices that use binary-amplitude and binary-phase Fresnel lenses is described, identifying programmable features, resolution limits, and applications.Keywords
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